In addition to MSpencer’s great post, I found this search.eb.com/women/articles/Drexel_Katharine_Mary.html while searching.
I didn’t know anything about St. Katharine Drexel, but, boy am I impressed.
I think your friend might find her to be a powerful patron, intercessor, and model. According to this (secular) article, when she passed away she had spent over $12,000,000 dollars of her vast fortune. She founded the Sisters of the Blessed Sacrament.